(function ($) {
	$.fn.myScroll = function (options) {
		//默认配置
		var defaults = {
			speed: 40,  //滚动速度,值越大速度越慢
			rowHeight: 24 //每行的高度
		};
		var opts = $.extend({}, defaults, options), intId = [];

		function marquee(obj, step) {
			obj.find("ul").animate({
				marginTop: '-=1'
			}, 0, function () {
				var s = Math.abs(parseInt($(this).css("margin-top")));
				if (s >= step) {
					$(this).find("li").slice(0, 1)
					// $(this).find("li").slice(0, 1).appendTo($(this));
					// $(this).css("margin-top", 0);
				}
			});
		}

		this.each(function (i) {
			var sh = opts["rowHeight"], speed = opts["speed"], _this = $(this);
			// console.log(sh)
			intId[i] = setInterval(function () {
				if (_this.find("ul").height() <= _this.height()) {
				} else {
					marquee(_this, sh);
				}
			}, speed);
			_this.hover(function () {
			}, function () {
			});
		});
	}
})(jQuery);
